在iOS9中我的应用程序SWPi在main.m崩溃：
#import <UIKit/UIKit.h>
int main(int argc,char *argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int retVal = 0;
@try
{ NSLog(@"MAIN:");
retVal = UIApplicationMain(argc,argv,nil,nil);
}
@catch (NSException *exception)
{ NSLog(@"CRASH: %@",exception);
NSLog(@"Stack Trace: %@",[exception callStackSymbols]);
}
@finally
{ [pool release];
}
return retVal;
}
跟踪：
2015-09-19 12:31:57.197 SWPi[441:79241] MAIN: 2015-09-19 12:31:57.533 SWPi[441:79241] CRASH: *** -[__NSArrayM insertObject:atIndex:]: object cannot be nil 2015-09-19 12:31:57.550 SWPi[441:79241] Stack Trace: ( 0 CoreFoundation 0x22de96a3 <redacted> + 150 1 libobjc.A.dylib 0x34762e17 objc_exception_throw + 38 2 Foundation 0x23b69903 <redacted> + 110 3 Foundation 0x23b69abf <redacted> + 442 4 Foundation 0x23b3c9c9 <redacted> + 3764 5 Foundation 0x23b3ba6d <redacted> + 276 6 UIKit 0x27332f57 <redacted> + 1110 7 UIKit 0x27334f1d <redacted> + 196 8 UIKit 0x27143d19 <redacted> + 48 9 UIKit 0x26f1f34d <redacted> + 260 10 UIKit 0x27142d61 <redacted> + 1232 11 UIKit 0x27155db9 <redacted> + 36 12 UIKit 0x271403cf <redacted> + 134 13 FrontBoardServices 0x2ad82ccf <redacted> + 230 14 FrontBoardServices 0x2ad82fc1 <redacted> + 48 15 CoreFoundation 0x22dacc3f <redacted> + 14 16 CoreFoundation 0x22dac82d <redacted> + 452 17 CoreFoundation 0x22daab9b <redacted> + 794 18 CoreFoundation 0x22cfe249 CFRunLoopRunSpecific + 520 19 CoreFoundation 0x22cfe035 CFRunLoopRunInMode + 108 20 UIKit 0x26f18b2d <redacted> + 524 21 UIKit 0x26f138a9 UIApplicationMain + 144 22 SWPi 0x00015f6f main + 182 23 libdyld.dylib 0x34eae873 <redacted> + 2
)
在iOS8下,一切都是对的.
哪里可能有问题？
为所有异常插入断点后调试：
2015-09-19 13:35:16.322 SWPi[454:85641] MAIN: (lldb) bt * thread #1: tid = 0x14e89,0x34762df0 libobjc.A.dylib`objc_exception_throw,queue = 'com.apple.main-thread',stop reason = breakpoint 1.1 frame #0: 0x34762df0 libobjc.A.dylib`objc_exception_throw frame #1: 0x22d03d7e CoreFoundation`-[__NSArrayM insertObject:atIndex:] + 622 frame #2: 0x26fe40d4 UIKit`-[UINavigationController _navigationItems] + 240 frame #3: 0x272181e6 UIKit`-[UINavigationController initWithCoder:] + 886 frame #4: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #5: 0x23b3ba6c Foundation`_decodeObject + 276 frame #6: 0x271ba5cc UIKit`-[UINavigationBar initWithCoder:] + 404 frame #7: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #8: 0x23b3ba6c Foundation`_decodeObject + 276 frame #9: 0x271b6bfe UIKit`-[UINavigationItem initWithCoder:] + 734 frame #10: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #11: 0x23b3ba6c Foundation`_decodeObject + 276 frame #12: 0x271fa904 UIKit`-[UIViewController initWithCoder:] + 460 frame #13: 0x27333ce2 UIKit`-[UIClassSwapper initWithCoder:] + 218 frame #14: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #15: 0x23b3ba6c Foundation`_decodeObject + 276 frame #16: 0x273339f0 UIKit`-[UIRuntimeConnection initWithCoder:] + 160 frame #17: 0x2733404c UIKit`-[UIRuntimeEventConnection initWithCoder:] + 52 frame #18: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #19: 0x23b427d2 Foundation`-[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1378 frame #20: 0x23adf2da Foundation`-[NSArray(NSArray) initWithCoder:] + 318 frame #21: 0x23b3c630 Foundation`_decodeObjectBinary + 2844 frame #22: 0x23b3ba6c Foundation`_decodeObject + 276 frame #23: 0x27332f56 UIKit`-[UINib instantiateWithOwner:options:] + 1110 frame #24: 0x27334f1c UIKit`-[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 196 frame #25: 0x27143d18 UIKit`-[UIApplication _loadMainNibFileNamed:bundle:] + 48 frame #26: 0x26f1f34c UIKit`-[UIApplication _loadMainInterfaceFile] + 260 frame #27: 0x27142d60 UIKit`-[UIApplication _runWithMainScene:transitionContext:completion:] + 1232 frame #28: 0x27155db8 UIKit`__84-[UIApplication _handleApplicationActivationWithScene:transitionContext:completion:]_block_invoke3181 + 36 frame #29: 0x271403ce UIKit`-[UIApplication workspaceDidEndTransaction:] + 134 frame #30: 0x2ad82cce FrontBoardServices`-[FBSSerialQueue _performNext] + 230 frame #31: 0x2ad82fc0 FrontBoardServices`-[FBSSerialQueue _performNextFromRunLoopSource] + 48 frame #32: 0x22dacc3e CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14 frame #33: 0x22dac82c CoreFoundation`__CFRunLoopDoSources0 + 452 frame #34: 0x22daab9a CoreFoundation`__CFRunLoopRun + 794 frame #35: 0x22cfe248 CoreFoundation`CFRunLoopRunSpecific + 520 frame #36: 0x22cfe034 CoreFoundation`CFRunLoopRunInMode + 108 frame #37: 0x26f18b2c UIKit`-[UIApplication _run] + 524 frame #38: 0x26f138a8 UIKit`UIApplicationMain + 144 * frame #39: 0x00074f8e SWPi`main(argc=1,argv=0x00920b54) + 182 at main.m:7
*编辑
麻烦在于主xib.
iOS4-8忽略它,iOS9没有.
在文字模式中：
<navigationItem key="navigationItem" title="Item" id="R9S-B3-9Aq"/>
此项目在父控制器的Outlets中的Xcode中可见,但在文本模式下的xib中没有插座引用.
在Xcode中,这个插座与其他插座一样是灰色的,我无法将其删除.
在文本模式下删除xib的这一行,并且出口&父母的引用* .m& * .h app正常运行.
解决方法
正如其他人所说,你在代码中的某个地方插入一个nil对象.调试器不是很好地报告发生错误的源代码行.它可能表明它在main.m中,但这显然是错误的.
尝试在所有Objective-C异常上设置全局断点.这通常会导致Xcode向您显示导致崩溃的实际行. (不需要在main.m中使用try / catch,它甚至可能会混淆.)
编辑：
好的,我想我看到你在答案中改变了什么.您添加了第二个堆栈跟踪.
您的崩溃日志是否仍然声称main.m中发生了错误？从第二个崩溃日志开始,打开初始视图控制器的视图控制器场景可能会出现问题.有一个对_runWithMainScene的引用：transitionContext：在栈跟踪中完成,然后,– [UIApplication _loadMainNibFileNamed：bundle：](内部Storyboard实际上包含nibfiles.
我的猜测是你的故事板中的根视图控制器中存在一些微妙的损坏.还有一个调用 – [UINavigationController _navigationItems].这表明根视图控制器中的导航项可能存在问题.
我认为您的应用使用导航控制器作为根视图控制器？
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